Batch convert smd to fbx files
Python isn't hard to start learning, try this tutorial. You can use the python console in blender if you don't have python already installed.

You don't need to create a database as you can walk through all files in the directories and just use the filesystem as a todo list. This is the basics of what you want to do but you may want to make some adjustments, you will at least have to swap bpy.ops.import_scene.obj for the smd importer that you have.

import bpy
import os

for root, dirs, files in os.walk('/path/to/smd/files'):
    for name in files:
        if name.endswith('smd'):
            # delete everything
            bpy.ops.object.select_all(action='SELECT')
            bpy.ops.object.delete()
            # adjust this to match the import smd operator
            bpy.ops.import_scene.obj(filepath=os.path.join(root, name))
            # export as fbx
            bpy.ops.export_scene.fbx(filepath=os.path.join(root, name+'.fbx'))


You can paste this into blender's text editor, edit and then click the run script button.